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    <script>
        // 需求：求数组[2,6,1,77,52,25,7]中的最大值
        let arr = [2, 6, 1, 77, 52, 25, 7]
        let max = arr[0]
        let min = arr[0]
        for (let i = 1; i < arr.length; i++) {
            if (max < arr[i]) {
                max = arr[i]
            }
            if (min > arr[i]) {
                min = arr[i]
            }
        }
        console.log(`最大值是：${max}`)
        console.log(`最小值是：${min}`)
    </script>
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